SPECIAL ORDER ITEM. Review Returns Policy before purchase. The XL Brass Coupling collection provides a robust and reliable solution for complex plumbing infrastructure. Engineered for high-performance PEX hot and cold water systems, this coupling ensures a secure and leak-resistant connection in demanding environments. Its advanced construction is specifically designed to be dezincification resistant, maintaining structural integrity over time even in challenging water conditions. This component is an essential choice for professionals working in commercial, institutional, and residential settings where long-term reliability is paramount.